Grinding machine



W. J. COLLINS.

GRINDING MACHINE.

APPLICATION FILED MAY 21. 1921.

Patented May 30, 1922* 2 SHEETS-SHEET I.

lll/VE/VTOR WLLMI /JC OLLIIVS- 5% A TTOHNEYS W. I COLLINS.

GRINDING MACHINE. APPLICATION FILED MAY 21, I921.

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GRINDING Application filed May 21,

To all whom it may concern:

Be it known that I, umen J. CoLLINs, a citizen of the United States, and a resident of the city of New York, borough of Brooklyn, in the county of Kings and State of New York, have invented a new and Improved Grinding Machine, of which. the following is a full, clear, and exact description.

The present invention relates to-new and useful improvements in grinding machines, and it pertains more particularly to a machine especially adapted for the grinding of valves of internal combustion motors.

It is one of the objects of the invention to provide in combination with a grinding element, means for supporting the valve to be ground in grinding contact with said grinding element.

It is another object of the invention to' provide. means whereby the valve to be ground may be adjusted relatively to the grinding element in order that seats of varr ous angles may be ground upon the valve.

It is a further object of the inventionjto provide means whereby the valve and the valve seat of an internal combustion motor or similarmachine may be ground by use of the same device and have contacting seats of different angles.

It is a further object of the invention to provide means whereby the valve being; ground may be moved in opposite directions across the grinding element in contact therewith at the will of the operator.

t is a still further object of the invention to provide meaus'in combination with the feeding means of the valve to constantly rotate the valve during the grinding operation.

With the above and other objects in view, reference is had to the accompanying drawings, in vvhich .Figure 1 is a view in side elevation of a machine constructed in accordance with the present invention;

Fig. 2 is a top plan view;

Fig. 3 is a detail sectional view taken on the line 33 of Fig. 2;

Fig. 4 is a detail view in elevation of the traveling carriage of the machine;

Fig. 5 is a detail sectional view taken on the line 5-5 of Fig. l;

Fig. 6 is'a detail sectional view taken on the line 6--6 of Fig. 4e.

Referring more particularly to the drawings, the machine comprises a base 10 se- Specification of Letters Patent.

tween the sides of the base 10.

BRGOKLYN, NE?! YORK.

MILCHINE.

Patented May 3%, 359 22.

1921. Serial No. 471,385.

cured to a bench or other suitable support by means of screws, bolts, or the like 11,

passing through feet 12 formed on said base. The base is provided with a plurality of spaced lugs 13, and mounted in said lugs are guide rods 14. Suitably mounted on these guide rods 14 is a carriage or table 15, and de vending from said table 15 is a pair of spaced lugs 16, extending downwardly be- In order to provide for slidably mounting the table 15 on the guide rods 14, the table is provided at diametrically opposite points with guides or the like 17 through which the rods 14 pass.

Referring to Fig. 3 it will be apparent that the table 15 is hollowed out as indicated by the reference character 18, and mounted in said hollowed out portion 18 is a bevel gear 19. This bevel gear 19 is carried upon a vertical shaft 20 mounted in a bearing 21 in the table 15, and carried upon the lower end of said shaft 20, is a bevel gear 22. a

The forward end of the base 10 is provided with a lug 25, and said lug 25 is internally" screw-threaded. Passing through the lug 25 and having threaded engagement therewith, is a shaft 26, said shaft being threaded as indicated by the reference char acter 27. The outer end of this shaft 26 is squared as at 28 to provide for the attachment of an operating handle 29.

The reference character 30 designates a bevel gear mounted upon the shaft 26, and this bevel gear 30 meshes with the bevel gear 22 on the lower end of the shaft 20. As more clearly shown in Fig. 5, the bevel gear 30 is rigidly carried by a sleeve 81 and said sleeve is adapted to be secured to the shaft 26 by means of a set screw 27*. When this set screw 27 is loosened, the shaft 26 is free to rotate within the sleeve 31 for a purpose to be hereinafter more specifically described. This sleeve 31 heretofore mentioned is mounted between the depending lugs 16 of the table 15 and the shaft 26 is extended beyond said lugs and mounted in a transverse partition or brace 34.

By this construction it is apparent that as the shaft 26 is rotated by means of the operatin handle 29, the shaft will move longitudina ly of the threaded lug 25 and that in so moving owing to the fact that the sleeve 31 is mounted between the lugs 16, the table 15 will be moved longitudinally of the guide rods Simultaneously with this movement through the medium of the bevel gears 30 and and the shall; 20, the bevel gear l9 will be rotated iv'lounted upon the table 15 is a plubform 10, and carried 'by said platform ll) a bearing or the like This platform ll is adapted to be rotatably mounted upon the table 15 and the same .l'ilzllliillll-lnerl against rotation relative to Jim table by means oi a dog 42 The construction of this locking means is shown in Fig. 6, an in said figure it will be seen that the platform 4:0 is provided with an annular engular groove ll-8 with which the dog 42 is adapted to engage. in order to cause engagement of the dog 42 with the angular groove 43, a screw-threaded plug as pro vided with a socket 4:5 for the reception of a wrench, is mounted in the table 15. By 1 this construction it will be apparent that as the plug; 4A is turned up, the dog 4:2 will be forced into engagement with the groove to prevent movement of the platform 40 relative to the table 15. To permit of roifiairy movement of the platform 40, it is -ly necessary to back the plug 4:4; our of its recess and out of engagement with the (dog 43 This action provides a space at the forward portion of the recess into whicl'i the dog 42 is free to move upon rosary movement of the platform 40. As the dog .42 moves ,into this'space the platform is free to rotate since the dog has been disengaged from the 'angulangroove.

Mounted in the bearing 41 heretofore mentioned. is a chuck and said chuclr comprises an inner resilient member 47 screw threaded as at 48 and engaged by a sleeve 49, said sleeve being scri'nvlhreaded as at 50. The outer end of the sleeve is squared as at 51. to provide means by which it may be engaged by a wrench to rotate the sleeve 49 and cause a retraction oi; the resilient member at? to grip about the stem of a valve 52. Surrounding the sleeve 49 is a sleeve 63, and carried by the sleeve 53 is a bevel gear 54, which meshes with the bevel gear 19. By this construction it will be seen that as the bevel gear ll) is rotated, the sleeve F1 will be rotated through the me (hum of the gear 5% and the valve 52 carr ed by the resilient member 4;? ol the chuck will likewise be rotared.

Mounted in (1 lug 56 upon the top of the bearing ll, is a sliding member 57. which is adapted to engage the teeth of the bevel. gear 5 under the influence of i'he coil spring when the pin 539 has been removed, the lower end oi said pin engaging in a recess in the lug; 56.

From the foregoing eonstrucl'ion it is apparent that (the valve 52 carried by the chuck in addition to being: robot-ably niouut ed, is capable of movement relative to the base ill, to move the valve across the face oi the grinding wheel 71'.

Th sliding member 5? is provided with a pawl 60 which is adapted to engage between the teeth of the gear 54: to prevent rotation of said gear in order that the znemher 49 may prevented from rotating when the end 5i thereof is engaged by a "rench to operate the chuck to adjust and remove the valve therefrom.

Upon the opposite end of the base 10, a plurality of lugs 76 are formed and slidably mounted in said lugs are guide rods 71. These guiderods 71. support a table or base 72, and mounted upon saidbase 72 is a motor 73. This base 72 is provided with threaded depending lugs 74 and engaging therewith is a threaded shaft 75 operated by a handle 76. By this construction it is apparent that upon rotation of the handle 76, the motor 73 will be moved transversely of the base 10. owing to the threaded. engagement of the shaft 75 with the threaded lugs M. The

armature shaft- 76' of the motor 73' extends parallel to the longitudinal axis of the base of the machine and the inner end of this sha 1'1: 76 is provided with a grinding wheel 7? and said grinding wheel will be moved transversely of the machine upon movement of the motor transversely of the machine in lhe manner hereinafter described The device operates in the following manner:

The valve 51 is positioned within the chuck in the above-described manner, after which the screw-threaded plug 44 is backed out of its screw-threaded recess to permit of rotary movement of the platform 40 relagive to the table 15. When this platform 4E0 has been properly adiusted, which adjustment will be indicated by the scale 100 shown in Fig. 4, the screw-threaded plug 45 is forced inwardly of its recess and the dog 4.2 engaged with the annular groove 43 in the platform 40. By this means it isapparent that the proper angular adjustment of the valve 52 relative to the grinding wheel 77 is had. The motor 73 is. now start ed and the grinding wheel 77 is rotated.

rotating the same the table 15 will be moved longitudinally of the guide rods 14. in the manner heretofore described and the valve will be advanced in the direction of the grindin wheel 77. When the valve has ad vanced Iar enough to intersect the path of travel of the grinding wheel transverselyof the machine, the operating handle or lever 76 is rotated to move the motor 73 and grinding wheel 77 into Contact wish the valve 52. As the grinding wheel 77 contacts with the valve 52-, the grinding operation starts and a lace is ground upon the valve 52.

in order that the valve may be ground to the proper extent, it 'is only necessary. to

'afizi've to the grinding Wheei 77.

roaize the operating hendle 29 in opposite direciions to move the vaive across the is adapted to grind tools, and more particuw l rl reamer ior resurfacing valve seats S k,

ih which the valves are subsequently rated to engage. in carrying out-this op- ,eraii'on, assuming thatche race on the valve 52 been our; to an angle of ill *sy-iive degrees, the rea ner which it is intended in resurface a seat will be engaged in the check in the same manner as is the valve 52,

end the piaiform will he edjnsced relat ziveiy to the table 15 in such a posirion that the several lteethaof the reanoer Wili be posh iioned e5; an angle of thirty-five degrees rei- Afier the Work has thus been positioned or set, the pawl in the sliding member 5? is engaged with ihe teeth of the gear 5 2 to prevent roration thereof and the screw 27*. ioosened, is being understood, of course, ihai, the grinding Wheel and theieeih of the learner have been engaged insuoha manner that when the motor is started, the teeth of the reamer will be ground to thirty-five degrees. I?) is further to be iindersiood thal; the several teeth of the reamer will be ground separately. I

From the foregoing it is apparent that when the learner is ground, the teeth or cutting edges chereof will correspond do the angle oilihe face of the valve and when the seat with which the valve is adapted to engage has been faced by said reamer, the angle of the face of the valve and the seat with which it is adapted to engage will coincide. From the foregoingii is apparent than the present invension provides a new and improved machii e for use pariicniarly in con neciion with ihe grinding of valves oi inrernal combustion motors, pumps and the hire, and that said machineis pariicniariy useful for obtaining accurate resrilts withoni the employmeni of large machines, such as iturrei isihes, inrreli grinders and his iike.

screw threaded I claim: I v

1. A. valve grinding device comprising a base, a table movable longitudinally of said base, a valve holder carried by said table, a train of gearing for rotating said valve holder, means for driving said train oi gearing, means for engagement with one of him gears of said treinof gearing for locking the same against operation, and means for releasing another of the gears of said train or gearing to permit the driving member of the train of gearing to rotate Without driving said train of gearing.

In a valve grinding machine, a base h ving a screw threaded opening, a rotatabie rod mounted in said base and engaging said screwdhreaded opening, whereby upon rofd'siion of she rod it will be moved relative to thebase, a table movable with respect to said base, means carried by ihejable and having engagement with said rod whereby upon rotaiion of saidrod the table will be- 'inoved relasive to this base, a valve holder,

a train of gears for rotating said valve hoi-der, one of the gears of sa d irain of gears being carried by sald screw-threaded rod-means for reieasably securing said gear to the rod to; cause the gear torotaie therewith, and means for engaging oneof the gears }of said train of gearing to lock the irain of gearing against rotation.

\ 3. In a valve grinding machine, a base having a screw-threaded opening, a screwthreaded rod having engagement with said opening and rotatably mounted in the base, a table movable relatively to. the base, a nluraliivof lugs depending from Said table and means on said rod engaging said 'lngs'vvhereby upon ronary movement of the rod-the table Will be moved relatively to the base, a valve holder carried by said table, a irain' of gearing for rotating said valve holder, sai train of earing being: operated from a g r carried y said. rod, flmeans for engagiiig' one of the gears of said train of gearing to prevent operation of the train of gearing, and

WILLIAM J. conLINs. 

